Electrical resistivity tomography data on irrigated fields, Fort Irwin National Training Center, California, 2019-2020
type: Dataset
description: The U.S. Army Fort Irwin National Training Center (NTC), approximately 35 miles north-northeast of Barstow, California, obtains all of its potable water supply from three groundwater basins (Irwin, Langford, and Bicycle Basins) within the NTC boundaries. In these basins, groundwater withdrawals exceed natural recharge, resulting in water-level declines. However, managed aquifer recharge using treated wastewater has offset water-level declines in Irwin Basin. Additionally, localized water-quality changes have occurred in some parts of Irwin Basin as a result of human activities (for example, wastewater disposal practices, landscape irrigation, and (or) leaking pipes). As part of a research study in cooperation with the U.S. Environmental Protection Agency (EPA) and the U.S. Army, the U.S. Geological Survey (USGS) collected eight electrical resistivity tomography (ERT) surveys on five irrigated fields in Irwin Basin in July 2019 and February 2020. The ERT geophysical technique injects direct-current electricity with known voltage and current into the earth using a series of electrodes and measures the resulting resistivity. This technique is generally limited to investigations of aquifer properties that are less than 100 meters below land surface.
keyword: amerigeo
keyword: amerigeoss
keyword: california
keyword: ckan
keyword: electrical-resistivity-imaging
keyword: environment
keyword: fort-irwin
keyword: geo
keyword: geoscientificinformation
keyword: geoss
keyword: groundwater
keyword: hydrologic-processes
keyword: mojave
keyword: national
keyword: north-america
keyword: resistivity
keyword: united-states
keyword: usgs-5d2e96f4e4b038fabe22e13c
keyword: water-resources
issued: 2025-11-21T05:22:23.289775
modified: 20200812
theme: {geospatial}
contact point: Organization
  fn: Krishangi Groover
spatial: Location

US Migrating
type: Agent

Original Metadata
type: Distribution
description: The metadata original format
media type: text/xml
format: XML
access URL: https://data.usgs.gov/datacatalog/metadata/USGS.5d2e96f4e4b038fabe22e13c.xml
issued: 2022-08-06T23:48:29.597849
modified: 2025-11-21T05:22:23.278477

Digital Data
type: Distribution
description: Landing page for access to the data
media type: application/http
format: XML
access URL: https://doi.org/10.5066/P9T8OLSL
issued: 2022-08-06T23:48:29.597855
modified: 2025-11-21T05:22:23.278912